Improvement in machines for dressing brasses of journal-boxes



G. SANFORD. Machines fo'r Dressing Brasses of Journals-Boxes,

No."136,338, Patemedfeszranasf l? l i I MN. l'

"www AM. Pham-mummia m Mammals mams) UNITED STATES PATENT GEETCE.

GELSTON SANFORD, OF STROUDSBURG, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR DRESSING BRASSES 0F JOURNAL-BOXES.

Specification forming part of Letters Patent No. 136,338, dated February 25,1873.

To all whom it may concer-n:

Be it known that I, GELsToN SANFORD, of Stroudsburg, in the county of Monroe and State of Pennsylvania, have invented certain Improvements in Machines for Dressing Axle- Brasses and other bearings, of which the following is a specication: Y

This invention relates to machines for dress- 'ing the brasses of axle-boxes, `journal-boxes,

and other bearings; and consists in certain combinations of mechanism for accomplishing said end by forcing a cutter or cutters through a pair of brasses or bearing-blocks in a straight line or course, free from rotation of either the cutter or the brasses, whereby the brasses may not only be dressed true and without ridges, but the longitudinal movement of the cutterspindle in both or reverse directions is made to dress a succession of duplicate brasses, and every facility is afforded vfor clamping, adjusting, and releasing the work under operation.

In the accompanying drawing, which forms part of this specification, Figure l represents a plan of a machine constructed in accordance with my invention; Fig. 2, a longitudinal vertical section of the same, mainly on the line :n

w; Fig. 3, a transverse vertical section on the line y y; Fig. 4, a view in perspective of a detachable work-holder with a pair of brasses therein; and Fig.'5, a longitudinal sectional view upon a larger scale than in Figs. l, 2, and 3 of the cutter and cutter-holder in part, in illustration of the manner in which the cutter is fed.

Similar letters of reference indicate correspondin g parts.

A is the frame of the machine, which may be of any suitable description. B is the driving-shaft, utted with loose and reversing pulley G G1 (12,1"01' stopping, starting, and reversing the motion of the cutter-holder D, which is actuated by gearing E, F, G, and H, the latter wheel, H, of which is constructed to form a revolving nut, within or through which the cutter-holder D, having a screw-thread on it to correspond, works-that is, moves lon gitudinally in either or opposite directions, according to the rotation of the nut, a xed guide, b, entering a longitudinal groove, c, in the screw portion of the cutter-holder, to keep it from turning. The cutter may either be constructed single or double, accordingly as it is required to operate in one direction' or in opposite directions 5 but is here shown as made double, being composed of any desired number of yloevel-edged cutting-disks, d, clamped together in sets upon the holder D, on opposite sides of a circular finishing-cutter, e, which has its opposite cuttin g-ed ges internally bcveled in reverse directions. The cutting-disks d are also reversely beveled on opposite sidesv of the finishing-cutter e, and the rst two o1' three of said disks in immediate proximity to the tnishing-cutter e are successively ot' diminishin g diameter,while the remainder oi' said disks are of a uniform and reduced diameter, or may be altogether dispensed with, and the shaft or tool-holder D be of an enlarged diameter at such part, but in every case of less size than the cutting-disks and finishing-cutter. This forms a partially-tapering cutter, which, though operating gradually, is true in its linishing action on the brasses being dressed. The several cutting disks or devices may be slipped oft' the holder D, for the purpose of sharpening them, or replacing them by others either of the same or different diameter, by simply removing the clamping-nut f on the one end of the holder. Constructed as described, the whole cutter is of a double and reverse partial taper for operating in both di rections, either tapering or partially tapering portion serving to dress a pair ot brasses, and the cutter e following to finish the work. I I represent a pair of brasses for two railroad-car axle-boxes to be dressed. These brasses are arranged face to face within a loose holder, J, the teats or projections on the backs of the brasses entering slots in the sides of the holder. The holder J', with the brasses in it, is y slipped within a clamp, K, with the ends of the brasses facing the cutter, said holder entering between plates g h of the clamp, the one, g, of which is movable by means of a handle, fi, and attached rod k, while the other plate, h, and corresponding plate h on the other side ofthe movable plate g are arranged loosely on the ends of bolts l l, on which the plate gis free to slide. The bolts l l admit of the plates 7L h being adjusted nearer or further apart, and the movable plate g is driven up by Wedges L Il, to clamp the holder J or brasses I I between it and the plate h in proper relation with the cutter. On taking out these wedges, the clamp is readily opened by the handle i to take out the holder for the insertion of another pair of brasses. The entire clamp with its holder and contained brasses may be moved in transverse relation with the cutter, to facilitate adjustment, by means ot' a plate, M, on which the clamp rests, said plate being free to slide in direction ot its length by means ot' a slotted hand-lever, N, that provides for a cross adjustment ofthe plate to adapt it to reverse actions of the cutter and other circumstances; but this plate M, with its means of adustment, forms no exclusive part of my invention, and other means may be substituted for them.

rlhe one pair of brasses is rst dressed out by passing the free or unsupported portion of the double partially-taperin g cutter through them While within their holder in the clamp, the finishing-cutter e completing the scraping or straight-cutting action, and the Whole cutter being passed through said pair of brasses, after which the latter may be removed and another pair of brasses be substituted therefor in the holder J, and the longitudinal movement of the cutter be reversed by changing the direction in rotation of the nut or Wheel H, having a screw-thread in its eye, Which causes the other or back tapering portion of the cutter to dress out such new set of brasses, the clamp K and holder J, with its contained brasses, being suitably held or shifted to resist the thrust of the cutter in either direction of its travel. After the cutter has been drawn or forced through the brasses, as described, the latter, one at a time, may be connected by their back tea-ts to a hand-lever, O, and be borne against arevolving reel-shaped cutter, P, having a concave arrangement of cutting ribs or projections on the inner side of each of its heads, for the purpose of rounding off the ends of the bearing-surfaces of the brasses.

What is here claimed, and desired to be secured by Letters Patent, is-

1. The partially -tapering circular cutter, composed of a finishing-cutter, e, and beveledged cutting-disks d, of successively diminishing diameter in immediate proximity to the finishing-cutter, in combination With the 1ongitudinally-slidin g screw-threaded cutter-holder D, and the revolving nut or Wheel H, sub stanti-allyas specified.

2. The reversely-beveled finishing-cutter e, in combination with the reversely beveled disks d on opposite sides of said cutter, and the longitudinally-sliding cutter-holder D, essentially as described.

3. The clamp K and brasses-holder J, in combination with the longitudinallyiliding tapering disk built cutter, substantially as specied.

4. The combination of the brass-holding lever O with the reel-cutter P, having concave cutting extremities Within its heads at either end, essentially as and for the purpose herein set forth.

GELSTON SANFORD.

Witnesses MICHAEL RYAN, D. MrsELL. 

